CN103414533B - Detect the method and apparatus of control information in a wireless communication system - Google Patents

Abstract

Provide a kind of method for detecting control information in a wireless communication system.The method includes: control channel check Cyclical Redundancy Check (CRC) mistake by monitoring, determines whether the value of error check field is equal to particular value, and, if the value of error check field is equal to particular value, then detection controls the control information on channel.

Description

Detect the method and apparatus of control information in a wireless communication system

The application be the international filing date submitted on March 26th, 2010 be in JIUYUE, 2008 Application No. 200880108910.4(PCT/KR2008/005718 of 26 days), the divisional application of invention entitled method of control information " in a wireless communication system detect " patent application.

Technical field

The present invention relates to radio communication, and more particularly, to a kind of method for detecting control information in a wireless communication system.

Background technology

In a wireless communication system, base station (BS) generally provides business to multiple subscriber equipmenies (UE).BS dispatches the user data of multiple UE, and emission control information together and user data.Control information comprises the schedule information about user data.It is commonly called control channel for carrying the channel of control information.It is commonly called data channel for carrying the channel of user data.UE monitors the control information controlling channel to search for UE, and by using the data of this control information processing UE.

The user data of this UE is distributed to, it is necessary to receive the control information about this user data controlled on channel in order to make UE receive.Generally, in a transmission intercal of the band alleviating distention in middle-JIAO of assignment, multiple control information segments of multiple UE are multiplexed.That is, in order to multiple UE provide business, BS multiplex multiple UE multiple control information segments and on multiple control channels emission control information.Each UE searches for the control channel of himself in multiple control channels.

Blind Detecting is for controlling one of scheme detecting specific control information in information segment in multiple multiplexings.Blind Detecting means that UE attempts required for recovering under the non-existent state of information controlling channel by combining multiple information segments recovery control channel.That is, when UE had not both known about and do not known about, from the control information whether multiple control information segments that BS receives are UE, the position that the control information of UE exists yet, all fragments of the UE the controls information to being provided decode, until the control information of this UE being detected.UE can use its unique information to determine, and whether the control information of reception is the control information of this UE.Such as, when BS multiplexes the control information of each UE, BS can be by by the unique identifier mask of each UE to Cyclical Redundancy Check (CRC), launching this identifier.CRC is the code used in error detection.UE makes its unique identifier solution mask to the CRC of controls information received, and can determine that whether the control information of reception be the control information of this UE by execution crc check subsequently.

But, when UE is detected by crc error and to monitor control channel, even if controlling the control channel that channel is another UE, may still be not detected by crc error and therefore may notify the decoded result of successfully decoded mistakenly.In the case of semi-persistent scheduling (SPS), the detection of incorrect crc error becomes even more problematic.This is because, in SPS, UE receives the control information for distributing radio resource and subsequently by using the radio resource using control information to distribute in SPS interim launch or receive data.Which results in the waste of limited radio resource and the deterioration of the reliability of radio communication.Accordingly, it would be desirable to a kind of method for the accuracy detection control information to increase.

Summary of the invention

Technical problem

The invention provides a kind of method for detecting control information in a wireless communication system.

Technical scheme

In one aspect, it is provided that a kind of method for detecting control information in a wireless communication system.The method includes: control channel check Cyclical Redundancy Check (CRC) mistake by monitoring；Determine that whether the value of error check field is equal to particular value, the field during wherein this error check field is the field that the control information being not detected by the control channel of crc error wherein includes；And, if the value of error check field is equal to particular value, then detect the control information controlled on channel being wherein not detected by crc error.

On the other hand, it is provided that a kind of subscriber equipment.This subscriber equipment includes: radio frequency (RF) unit, is used for launching and receiving radio signal；And processor, couple with RF unit and be configured to monitor and control channel check crc error, determine that whether the value of error check field is equal to particular value, field during wherein error check field is the field that the control information being not detected by the control channel of crc error wherein includes, and, if the value of error check field is equal to particular value, then detect the control information controlled on channel being wherein not detected by crc error.

It yet still another aspect, provide a kind of method for emission control information in a wireless communication system.The method includes: generate the control information including having the error check field of particular value；And, launch this control information on a control channel by making CRC be attached to this control information, wherein particular value and CRC according to error check field determine being properly received of control information.

Beneficial effect

Can provide the accuracy with raising in wireless communication system for the method detecting control information.The particular value of error check field can serve as virtual Cyclical Redundancy Check (CRC).Subscriber equipment can improve, by using this virtual CRC when control information being detected, the accuracy that crc error checks.That is, control information can be detected while effectively utilizing radio resource exactly.It is thus possible to improve overall system performance.

Accompanying drawing explanation

Fig. 1 is the block diagram illustrating wireless communication system.

Fig. 2 is the block diagram illustrating the function segmentation between Evolved Universal Terrestrial radio access network (E-UTRAN) and evolution block core (EPC).

Fig. 3 is the block diagram of the composed component illustrating subscriber equipment.

Fig. 4 is the diagram of the radio protocol architecture illustrating user plane.

Fig. 5 is the diagram illustrating the radio protocol architecture controlling plane.

Fig. 6 shows the mapping between downlink logical channel and downlink transport channel.

Fig. 7 shows the mapping between downlink transport channel and downlink physical channel.

Fig. 8 shows the structure of radio frame.

Fig. 9 shows the example of the resource grid about a downlink time slots.

Figure 10 shows the structure of subframe.

Figure 11 is to illustrate the flow chart that physical downlink control channel (PDCCH) configures.

Figure 12 is to illustrate the flow chart that PDCCH processes.

Figure 13 shows the example of the method for utilizing the untapped information field in the multiple information fields constituting down link control information (DCI) form.

Figure 14 is to illustrate according to an embodiment of the invention for detecting the flow chart of the method for control information.

Figure 15 is the flow chart of the downlink transmission being shown with dynamic scheduling scheme.

Figure 16 is the flow chart of the uplink data transmission being shown with dynamic scheduling scheme.

Figure 17 shows the example of the discharge model in voice over internet protocol (VoIP).

Figure 18 is the flow chart of the downlink transmission being shown with semi-persistent scheduling scheme.

Figure 19 is the flow chart of the uplink data transmission being shown with semi-persistent scheduling scheme.

Detailed description of the invention

Fig. 1 is the block diagram illustrating wireless communication system.Wireless communication system can have the network structure of evolved universal mobile communication system (E-UMTS).E-UMTS is referred to alternatively as Long Term Evolution (LTE) system.Wireless communication system can be disposed widely to provide various communication services, such as voice, grouped data etc..

With reference to Fig. 1, evolution UMTS terrestrial radio access network network (E-UTRAN) includes at least one base station (BS) 20, and it provides and controls plane and user plane.

Subscriber equipment (UE) 10 can be fixing or movement, and is referred to alternatively as another term, such as movement station (MS), user terminal (UT), subscriber station (SS), wireless device etc..BS20 is typically the fixed station that communicates with UE10 and is referred to alternatively as another term, such as enode b (eNB), base-station transceiver system (BTS), access point etc..BS20 can provide business to one or more communities.This community is the region that wherein BS20 provides communication service.Can use between BS20 for launching customer flow or controlling the interface of business.Hereinafter, downlink is defined as the communication link from BS20 to UE10, and up-link is defined as the communication link from UE10 to BS20.

BS20 interconnects by means of X2 interface.BS20 is also connected to evolution block core (EPC) by means of S1 interface, more specifically, be connected to Mobility Management Entity (MME)/gateway (S-GW) 30.S1 interface supports the many-to-many relationship between BS20 and MME/S-GW30.

Wireless communication system is possible not only to be multiple-input and multiple-output (MIMO) system or multiple input single output (MISO) system, it is also possible to be single-input single-output (SISO) system or single input and multi-output (SIMO) system.MIMO scheme uses multiple transmittings (Tx) antenna and multiple reception (Rx) antenna to improve data Tx/Rx efficiency and spectrum efficiency.The example of MIMO scheme includes space diversity, spatial multiplexing, beam shaping etc..

Fig. 2 is the block diagram illustrating the function segmentation between E-UTRAN and EPC.Slashed boxes shows that radio protocol layers and white box show the functional entity controlling plane.

With reference to Fig. 2, BS performs following function: (1) for the function of provided for radio resources management (RRM), such as radio bearer controls, radio access control, connects mobility and controls and configure about mobility and the measurement of scheduling and measurement report for Dynamic Resource Allocation for Multimedia, (2) Internet protocol (IP) header-compressed and the encryption of customer traffic, the route of (3) user plane data to S-GW, the scheduling of (4) beep-page message and transmission, the scheduling of (5) broadcast message and the transmission of UE and (6).

MME performs following function: the management of (1) Non-Access Stratum (NAS) signaling, (2) NAS signalling security, (3) idle mode UE accessibility, (4) tracking zone list, (5) roaming authenticate with (6).

S-GW performs following function: (1) mobility grappling and (2) Lawful intercept.PDN Gateway (P-GW) performs following function: (1) UE Internet protocol (IP) is distributed and (2) packet filtering.

Fig. 3 is the block diagram of the composed component illustrating UE.UE50 includes processor 51, memorizer 52, radio frequency (RF) unit 53, display unit 54 and user interface section 55.Each layer of radio interface protocol is realized in processor 51.Processor 51 provides and controls plane and user plane.The function of each layer can be realized in processor 51.Memorizer 52 coupled to processor 51 and stores operating system, application and generic-document.Display unit 54 shows the various information of UE and can use known element such as such as liquid crystal display (LCD), organic LED (OLED) etc..User interface section 55 can be configured with the combination of the well-known user interfaces of such as keyboard, touch screen etc..RF unit 53 coupled to processor 51 and launches and/or receive radio signal.

Based on OSI(Open Systems Interconnection) model known in communication system lower three layers, the Radio interface protocol layers between UE and network can be categorized as L1 layer (ground floor), L2 layer (second layer) and L3 layer (third layer).Physical layer, or it is called for short PHY layer, belong to ground floor and provide information transfer service by physical channel.Radio resource controls (RRC) layer and belongs to third layer and for the radio resource controlling between UE and network.UE and network exchange RRC information via rrc layer.

Fig. 4 is the diagram of the radio protocol architecture illustrating user plane.Fig. 5 is the diagram illustrating the radio protocol architecture controlling plane.Which illustrate the framework of radio interface protocol between UE and E-UTRAN.User plane is the protocol stack for user data transmission.Controlling plane is the protocol stack for control signal transmission.

With reference to Figure 4 and 5, PHY layer belongs to ground floor and provides information transfer service by physical channel for upper strata.PHY layer couples with medium education (MAC) layer (i.e. the upper strata of PHY layer) by transmitting channel.Between MAC layer and PHY layer, data are transmitted by transmitting channel.Between different PHY layer (that is, the PHY layer of transmitter and the PHY layer of receiver), by physical channel transfers data.

MAC layer belongs to the second layer and provides business by logic channel to radio link control (RLC) layer (i.e. the upper strata of MAC layer).Rlc layer in the second layer supports the transmission of reliable data.There are three kinds of operator schemes according to data transferring method, i.e. transparent mode (TM), unacknowledged mode (UM) and answer-mode (AM) in rlc layer.AM RLC provides bidirectional data transfers business and supports when the transmission failure of rlc protocol data cell (PDU) to retransmit.

Packet data convergence protocol (PDCP) layer belongs to the second layer and performs the header compression function for reducing IP packet header size.

Radio resource controls (RRC) layer and belongs to third layer and be defined the most in the control plane.Rrc layer for the configuration of radio bearer (RB), reconfigure and discharge and associatedly control logic channel, transmit channel and physical channel.RB is that the second layer transmits the business provided for the data between UE and E-UTRAN.When the RRC set up between the rrc layer of UE and the rrc layer of network connects, referred to as UE is in RRC connection mode.When still not setting up RRC and connecting, referred to as UE is in RRC idle mode.

Non-Access Stratum (NAS) layer belongs to the upper strata of rrc layer and for performing session management, mobile management etc..

Fig. 6 shows the mapping between downlink logical channel and downlink transport channel.This can be at 3GPP TS36.300V8.3.0(2007-12) technical specification group Radio Access Network；Evolved Universal Terrestrial radio accesses (E-UTRA) and Evolved Universal Terrestrial radio access network (E-UTRAN)；Whole description；Stage2(Release8) chapters and sections 6.1.3.2 finds.

With reference to Fig. 6, Paging Control Channel (PCCH) is mapped to paging channel (PCH).BCCH (BCCH) is mapped to broadcast channel (BCH) or downlink sharied signal channel (DL-SCH).CCCH (CCCH), DCCH (DCCH), Dedicated Traffic Channel (DTCH), multicast control channel (MCCH) and multicast traffic channel (MTCH) are mapped to DL-SCH.MCCH and MTCH is also mapped into Multicast Channel (MCH).

Type according to armed information limits the type of each logic channel.Logic channel is classified as two groups, i.e. controls channel and traffic channel.

Control channel to be used for transmitting control plane information.BCCH is the downlink channel controlling information for broadcast system.PCCH is for launching the downlink channel of paging information and using when network does not knows about the position of UE.CCCH is for launching the channel of the control information between UE and network and using when the RRC not setting up between UE and network connects.MCCH is the point-to-multipoint downlink channel controlling information for transmitting multimedia broadcast multicast service (MBMS).MCCH is used by the UE receiving MBMS.DCCH is the point-to-point one-way channel for launching the dedicated control information between UE and network, and by having the UE use that RRC connects.

Traffic channel is used for transmitting user plane information.DTCH is the point-to-point channel for transmitting user profile.DTCH may reside in up-link and downlink.MTCH is for launching the point-to-multipoint downlink channel of data on flows and being used by the UE receiving MBMS.

Classify to transmitting channel according to the type transmitted by the data of radio interface and characteristic.BCH is the broadcast in the whole overlay area of community and has fixing predefined form.DL-SCH is characterised by supporting mixed automatic repeat request (HARQ)；By changing modulation, coding and Tx power, by the probability broadcasted in whole community and the probability using beam shaping, support dynamic link adaptation；Support dynamically to distribute with semi-persistent resource；Support that UE discontinuously receives (DRX) to realize UE power save；And support MBMS transmission.PCH be characterised by support DRX with realize UE power save and support community whole overlay area in broadcast.MCH is characterised by supporting the broadcast in the whole overlay area of community and support MBMS single frequency network (MBSFN).

Fig. 7 shows the mapping between downlink transport channel and downlink physical channel.This can be at 3GPP TS36.300V8.3.0(2007-12) chapters and sections 5.3.1 in find.

It is mapped to Physical Broadcast Channel (PBCH) with reference to Fig. 7, BCH.MCH is mapped to Physical Multicast Channel (PMCH).PCH and DL-SCH is mapped to physical down link sharing channel (PDSCH).PBCH carries BCH transmission block.PMCH carries MCH.PDSCH carries DL-SCH and PCH.

Several Downlink Physical is used to control channel in the phy layer.Physical downlink control channel (PDCCH) is to the resource distribution of UE notice PCH and DL-SCH, and also notifies the HARQ information relevant to DL-SCH to UE.PDCCH can be with carry uplink scheduling grant, and the license of this uplink scheduling distributes for the resource of ul transmissions to UE notice.The number of OFDM (OFDM) symbol of the transmission of the PDCCH that physical control format indicator channel (PCFICH) is used in subframe to UE notice.Launch PCFICH in each subframe.Physical Hybrid ARQ Indicator channel (PHICH) carries HARQ response (ACK)/negative response (NACK) signal of response ul transmissions.

Fig. 8 shows the structure of radio frame.

With reference to Fig. 8, radio frame includes 10 subframes.One subframe includes two time slots.It is defined as Transmission Time Interval (TTI) for launching the time of a subframe.Such as, a subframe can have the length of 1ms, and time slot can have the length of 0.5ms.

The radio frame of Fig. 8 is shown only for exemplary purpose.Therefore, the number of the OFDM symbol that the number of the time slot that the number of the subframe that radio frame includes or subframe include or time slot include can differently change.

Fig. 9 shows the example of the resource grid about a downlink time slots.

With reference to Fig. 9, downlink time slots includes the multiple OFDM symbol in time domain.Although there has been described 12 subcarriers that a downlink time slots includes that 7 OFDM symbol and a Resource Block include in frequency domain, but this being merely cited for property purpose, and therefore the number of OFDM symbol and the unlimited number of subcarrier in this.

Element on resource grid is referred to as resource element.One Resource Block includes 12 × 7 resource elements.Number N DL of the Resource Block that downlink time slots includes depends on the downlink transmission bandwidth determined in community.

Figure 10 shows the structure of subframe.

With reference to Figure 10, subframe includes two continuous print time slots.Most three OFDM symbol in the forward part of the first time slot being positioned in subframe will be corresponding to being assigned the control area of PDCCH.Remaining OFDM symbol will be corresponding to being assigned the data area of PDSCH.In addition to PDCCH, the control channel of such as PCFICH, PHICH etc. can be assigned to control area.By being decoded the control information launched by PDCCH, UE can read the data message launched by PDSCH.Although control area includes three OFDM symbol herein, but this being merely cited for property purpose.PCFICH it will be seen that the number of the OFDM symbol that the control area of subframe includes.

Control area is made up of multiple control channel elements (CCE), and the plurality of CCE is logic CCE sequence.Hereinafter, the convergence (aggregation) of all CCE of the control area during CCE sequence represents one subframe of composition.CCE corresponds to multiple resource element groups.Such as, CCE can correspond to 9 resource element groups.Resource element group is for defining the control channel mapping to resource element.Such as, a resource element group can be made up of four resource elements.

Multiple PDCCH can be launched in control area.PDCCH carries the control information of such as dispatching distribution.The convergence of one or several continuous CCE is launched PDCCH.CCE number according to constituting CCE convergence determines PDCCH form and the number of available PDCCH bit.Hereinafter the number for the CCE of PDCCH transmission is referred to as CCE convergence level (aggregation level).CCE convergence level is the CCE unit for searching for PDCCH.The size of CCE convergence level is defined by the number of continuous CCE.Such as, CCE convergence level can be { the element of 1,2,4,8}.

Table 1 below illustrates the example of the number of the PDCCH form according to CCE convergence level and available PDCCH bit.

[table 1]

PDCCH form	CCE converges level	The number of resource element group	PDCCH bit number
				0	1	9	72
1	2	18	144
				2	4	36	288
3	8	72	576

The control information launched by PDCCH is referred to as down link control information (hereinafter referred to as DCI).DCI launches uplink scheduling information, downlink schedule information, system information, up-link power control command, the control information for paging, instruction RACH (RACH) the control information etc. that responds.And, DCI can launch the control information of the activation of instruction semi-persistent scheduling (SPS).DCI can also launch the control information of instruction SPS deexcitation.SPS can be used for up-link or downlink voice over internet protocol (VoIP) transmission.

nullThe example of DCI format includes the form 0 of the scheduling for physical uplink link shared channels (PUSCH)、Form 1 for the scheduling of physical down link sharing channel (PDSCH) code word、Form 1A for the compact scheduling of a PDSCH code word、The form 1B of the scheduling of single code word grade-1 transmission in spatial multiplexing modes、The form 1C closely dispatched for downlink sharied signal channel (DL-SCH)、The form 1D of the scheduling of the PDSCH in Multi-User Dimension multiplexing modes、The form 2 of the scheduling of the PDSCH in closed loop spatial multiplexing modes、The form 2A of the scheduling of the PDSCH in open loop spatial multiplexing modes、And the form 3 and 3A of the transmission for ordering about the transmitting power control (TPC) of uplink channel.

Figure 11 is to illustrate the flow chart that PDCCH configures.

Control information is generated according to DCI format with reference to Figure 11, BS.BS can select a DCI format according to the control information being mapped to UE pending from multiple DCI format (DCI format 1,2 ..., N).

In step s 110, additional cyclic redundancy inspection (CRC) is to check mistake from the control information generated according to each DCI format.Purposes according to PDCCH or the owner, unique identifier (that is, radio network temporary identifier (RNTI)) by mask on CRC.If PDCCH is used for specific UE, the then unique identifier (such as, community RNTI(C-RNTI) of this UE) can be with mask on CRC.I.e., it is possible to scramble together with the unique identifier of CRC with UE.Example about the RNTI of particular UE includes interim C-RNTI, semi-durable C-RNTI etc..Interim C-RNTI is the temporary identifier of UE and can use during random access procedure.Semi-durable C-RNTI may be used to indicate SPS and activates.

If PDCCH is for the beep-page message launched by PCH, then paging identifier (such as, paging-RNTI(P-RNTI)) can be with mask on CRC.If PDCCH is for the system information launched by DL-SCH, then system information identifier (such as, system information-RNTI(SI-RNTI)) can be with mask on CRC.If PDCCH is used for indicating accidental access response, this accidental access response is the response of the random access guiding for transmitting UE, then Stochastic accessing RNTI(RA-RNTI) can be with mask on CRC.Table 2 shows the example of mask identifier on PDCCH.

[table 2]

When using C-RNTI, interim C-RNTI or semi-durable C-RNTI, PDCCH carries the control information about corresponding particular UE.When using other RNTI, PDCCH carries the common control information that all UE in Dai You community receive.

In the step s 120, the control information that addition of CRC is performed chnnel coding to generate coded data.In step s 130, rate-matched is performed according to the CCE convergence level being assigned to PDCCH form.

In step S140, it is modulated generating modulation symbol to coded data.The modulation symbol constituting a PDCCH can have in CCE convergence level 1,2,4 and 8.In step S150, modulation symbol is mapped to physical resource elements (RE) (that is, the mapping of CCE to RE).

Figure 12 is to illustrate the flow chart that PDCCH processes.

With reference to Figure 12, in step S210, UE makes CCE from physics RE demapping (that is, the demapping of CCE to RE).In step S220, receiving PDCCH owing to UE does not knows about which CCE convergence level of use, therefore each CCE convergence level is demodulated by UE.In step S230, UE performs speed solution coupling to demodulating data.Owing to UE does not knows about the UE DCI format by the control information of reception, therefore UE performs speed solution coupling to each DCI format.In step S240, UE performs channel-decoding according to the data that speed solution is mated by bit rate, and detects mistake by performing crc check.If the mistake of being not detected by, then it is considered as UE and the PDCCH of himself detected.Otherwise, if be detected that mistake, then another CCE is converged level by UE continuously or another DCI format performs blind decoding.In step s 250, when the PDCCH of himself being detected, UE removes CRC from decoding data and therefore obtains the control information about UE.

The multiple multiplexing PDCCH for multiple UE can be launched in the control area of a subframe.UE monitors PDCCH.This supervision is the operation that UE attempts being decoded each PDCCH according to the DCI format monitored.Position in the control area that the PDCCH that BS does not provides instruction corresponding to UE assigns in subframe.UE is by monitoring that one group of PDCCH candidate in subframe finds the PDCCH of himself.This is referred to as blind decoding (or blind Detecting).By blind decoding, UE simultaneously performs to be transmitted into the decoding identifying and performing the control information launched by PDCCH of the PDCCH of this UE.Such as, if being not detected by crc error by making the C-RNTI of UE self solve mask from PDCCH, then it is considered as UE and the PDCCH of himself detected.

Limit and treat that the number of the DCI format launched by PDCCH is to efficiently reduce the expense of blind decoding.The different types of number of the control information that the number of DCI format is launched less than PDCCH to be used.DCI format includes multiple different information field.According to DCI format, the composition type of information field of DCI format, the number of information field, the bit number etc. of each information field are different.Additionally, according to DCI format, the size of the control information meeting DCI format is different.By using a DCI format in a limited number of DCI format, launch various control information by PDCCH.That is, any DCI format can be used for transmitting and has different types of two or more control information segment.Therefore, when by indicating control information to the multiple information fields assignment particular value constituting DCI format, some information fields in multiple information fields are probably unwanted.That is, in some information fields in the multiple information fields constituting DCI format, particular value can not be defined.Some information fields constituting DCI format can be reserved fields and therefore can be reserved when having arbitrary value.This information field is reserved for the adaptive purpose of size, so that multiple different types of control information can meet a DCI format.But, if there is reserved field when emission control information, then BS inefficiently consumes transmission energy and through-put power is used for being transmitted in untapped reserved field in any function.Therefore, when generating the control information meeting DCI format, a kind of method needing untapped information field that can utilize in the multiple information fields constituting DCI format.

Figure 13 shows the example of the method for utilizing the untapped information field in the multiple information fields constituting DCI format.

With reference to Figure 13, different types of control information A, B and C are grouped into one DCI format of use.Control information A, B and C meet a DCI format.DCI format is made up of multiple different information fields.By indicating control information A to all information fields of DCI format assignment particular value.By indicating control information B or C to some information fields of DCI format assignment particular value.In group, information A of control has maximum information bit size.This is because, all information fields of DCI format are configured to meaningfully be used in information A of control.The information bit size of control information A is reference information bit size.Empty information is affixed to control information B or C to coordinate the size identical with reference information bit size.Therefore, control information A in group, B and C are fixed to identical information bit size.

So, different types of control information is grouped into and meets a DCI format arbitrarily determined.Each control information segment is indicated by particular value being mapped to the information field constituting DCI format.By assigning particular value to all information fields of DCI format, may indicate that what group included arbitrarily controls information segment.On the other hand, by assigning particular value to some information fields of DCI format, may indicate that other control information that group includes.That is, when indicating that other control information, other information fields of DCI format are unwanted.For indicating that the overall size of the information field of control information can be defined as information bit size.The information bit size of the former control information is maximum.The information bit size of the control information of the latter is relatively small.

Reference information bit size is defined through assigning particular value to indicate information bit size during control information to all information fields of DCI format.Reference information bit size represents overall size and/or the size of DCI format self of the information field constituting DCI format.Other control information included in group have in the case of less than the information bit size of reference information bit size, and additional empty information is to coordinate the size identical with reference information bit size.That is, when indicating specific control information by some the information field assigned value in all information fields defined in DCI format, the remaining information field not wherein being assigned value is used as empty information.The information field being used as empty information is referred to alternatively as error check field.

Empty information is attached, so that the control information meeting DCI format has the size identical with the reference information bit size of this DCI format.When generating control information according to DCI format, the untapped information field of part can serve as sky information.Empty information has particular value.Such as, all bits of the information field being used as empty information all can be set to bit " 0 " or bit " 1 ".Alternatively, the field being used as empty information can be set to binary code flow valuve known to UE.This binary code stream can be named as binary system scrambler stream.According to for generate binary bit stream known to BS with UE with for generate BS with UE by use identical input parameter generate Gold sequence or the method for m-sequence, this binary stream can be generated.

Can predefine between BS and UE and be used as the information field of empty information or UE can be reported to by BS.Such as, BS can report the information about the information field being used as empty information by using RRC signaling or system information to UE.

When UE monitors PDCCH by performing crc error detection, the PDCCH of another UE may be recognized as the PDCCH of himself by UE mistakenly, or when utilizing the RNTI different from actual RNTI to perform to solve mask, UE may be recognized as mistakenly, be not detected by crc error and therefore decoding be successful.This is referred to as being mistake (false positive error) by mistake.Being mistake to reduce, empty information is used as virtual CRC or detects (probe) about extra false inspection by mistake.

Figure 14 is to illustrate according to an embodiment of the invention for detecting the flow chart of the method for control information.

Channel check crc error (step S310) is controlled by monitoring with reference to Figure 14, UE.Controlling channel can be PDCCH.If be detected that crc error, then UE monitors control channel (step S320) continuously.If being not detected by crc error, then UE determines that whether the value of error check field is equal to particular value (step S330).Error check field is in the field that the control information being wherein not detected by the control channel of crc error includes.Error check field is the information field being used as empty information in the multiple information fields constituting control information.

If the value of error check field is not equal to particular value, then UE monitors control channel (step S340) continuously.Otherwise, if the value of error check field is equal to particular value, then UE detection is wherein not detected by the control information controlled on channel of crc error, as the control information (step S350) of himself.I.e., only when empty information is decoded as particular value known to UE, the control information launched by corresponding PDCCH is received as the control information of UE.

Method for use sky information emission control information is described more fully below.Assume to be activated with instruction semi-persistent scheduling (SPS) by the DCI format emission control information using the PDCCH defined for other purposes.That is, instruction SPS activates control information and other kinds of control information use a DCI format.SPS can be used for up-link and downlink VoIP transmission.

Radio resource scheduling scheme includes dynamic scheduling scheme, persistent scheduling scheme and SPS scheme.Dynamic scheduling scheme is following scheme, wherein when no matter when launching or receive data by using control signal request schedule information.Persistent scheduling scheme is following scheme, wherein uses predetermined information, thus does not use when no matter when launching or receive data control signal to ask schedule information.SPS scheme is following scheme, does not wherein use control signal to ask schedule information in SPS interim when no matter when launching or receive data.SPS interval can start when receiving the control information that instruction SPS activates.SPS interval can be terminated when receiving the control information of instruction SPS deexcitation.Alternatively, can determine that SPS is spaced by RRC signaling.

Figure 15 is the flow chart of the downlink transmission being shown with dynamic scheduling scheme.No matter when when by PDSCH transmitting down link data, BS launches downlink (DL) by PDCCH to UE and permits.UE permits to receive the down link data launched by PDSCH by the DL of PDCCH reception by using.Advantageously, BS can be according to downlink channel conditions suitably dispatch radio resource.

Figure 16 is the flow chart of the uplink data transmission being shown with dynamic scheduling scheme.Before launching uplink data by PUSCH, BS distributes radio resource according to up-link (UL) license to UE.UL license is launched by PDCCH.

Ip voice (VoIP) business provides speech data by Internet protocol (IP) network.Routinely, in circuit switching (CS) territory, speech data is provided.But, in VoIP business, packet switch (PS) territory provides speech data.In speech business based on CS, while keeping connecting with end to end system, launch speech data.On the other hand, in VoIP business, owing to speech data can be launched by connectionless mode, therefore can effectively use Internet resources.

Along with the exploitation of wireless communication technology, amount of user data increases sharply.Therefore, in order to be efficiently used limited Internet resources, conventional business based on CS is replaced by business based on PS recently.Exploitation VoIP business the most in an identical manner, and it is contemplated that most of wireless communication system in future provides all speech businesses by VoIP.

Real time transport protocol (RTP) is developed effectively to provide speech business based on PS.And, RTP Control Protocol (RTCP) is also developed to control RTP.In RTP, carry time stamp information in each packet, and therefore can solve jitter problem.And, by RTCP report RTP packet loss, and therefore can control to reduce frame error ratio (FER) with through-rate.In addition to RTP/RTCP, by exploitation Session Initiation Protocol and Session Description Protocol (SDP), virtual link can be kept by the way of end-to-end.Therefore, it can greatly solve delay issue.

Figure 17 shows the example of the discharge model in VoIP.

With reference to Figure 17, VoIP generates two kinds of packets of voice, the packet i.e. generated in call burst and the packet generated in silence period.Such as, if it is assumed that the AMR of 12.2kbps (AMR), then in call burst, generate RTP packet with the cycle of 20ms, and this RTP packet has the size of 35 to 49 bytes.In silence period, generate RTP packet with the cycle of 160ms, and this RTP packet has the size of 10 to 24 bytes.

When generating packet with the constant cycle in the speech business in such as VoIP business, the size of the packet generated is relatively small and constant.Therefore, VoIP generally uses persistent scheduling scheme or SPS scheme.When using persistent scheduling scheme, distribute radio resource enduringly by forecast dispatching scheme in radio bearer configuration procedure, and therefore can launch in the case of the control signal not including schedule information and receive packet.When using persistent scheduling scheme to launch or receiving data, owing to using predetermined radio resource in the case of not providing schedule information, therefore do not consider the channel condition launched or receive at the time point of data.As a result, transmitted error rate may increase together with the change of channel condition.When call burst is used as SPS interval, VoIP is adapted in use to SPS scheme.

Figure 18 is the flow chart of the downlink transmission being shown with SPS scheme.BS launches, to UE, the control information that the SPS of instruction resource allocation information activates by PDCCH.In SPS interim, UE can receive VoIP data by PDSCH from BS by using resource allocation information.

Figure 19 is the flow chart of the uplink data transmission being shown with SPS scheme.BS launches, to UE, the control information that the SPS of instruction resource allocation information activates by PDCCH.In SPS interim, UE can launch VoIP data by PUSCH to BS by using resource allocation information.

First, the method by using DCI format 0 to launch the control information that instruction SPS activates will be described.By using the control information that DCI format 0 can launch instruction PUSCH scheduling and the control information indicating SPS to activate.SPS activates and can be used for the transmission of up-link VoIP.

Table 3 below shows the example of the control information using DCI format 0 to launch.

[table 3]

DCI format 0 includes multiple information field.This information field is (1) attribute field, (2) frequency hopping attribute field, the assignment of (3) Resource Block and frequency-hopping resource allocation field, (4) modulation and encoding scheme (MCS) and redundancy version field, (5) new data indicator field, (6) TPC command field, (7) cyclic shift field, (8) UL index field and (9) CQI (CQI) request field.Bit size the being merely cited for property purpose of each information field, and therefore bit size is not limited to this.

Attribute field is for making form 0 be different from the information field of form 1A.Resource Block assignment and frequency-hopping resource allocation field can have the bit size changed according to frequency hopping PUSCH or non-hopping PUSCH.Resource Block for non-hopping PUSCH assigns and frequency-hopping resource allocation field provides

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{UL}}(N_{\mathrm{RB}}^{\mathrm{UL}}+1)/2)\right|$

Individual bit is with the resource of the first time slot in distribution uplink sub-frames.Here,The number of the Resource Block that expression uplink time slot includes, and depend on the up-link Tx bandwidth determined in community.Resource Block for frequency hopping PUSCH assigns and frequency-hopping resource allocation field provides

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{UL}}(N_{\mathrm{RB}}^{\mathrm{UL}}+1)/2)\right|-N_{\mathrm{UL}\_\mathrm{hop}}$

Individual bit is with the resource of the first time slot in distribution uplink sub-frames.

If the number of the information bit that the number of the information bit of form 0 is less than form 1A, then " 0 " is attached to form 0 until load size becomes equal to the load size of form 1A.

All foregoing fields are used to represent the control information for PUSCH scheduling.Therefore, the control information with reference information bit size meets the DCI format 0 for PUSCH scheduling.

If use DCI format 0 launch for SPS activate control information, then for coordinate DCI format 0 reference information bit size and additional empty information can be used together, for virtual crc check with " 0 " bit filled for meeting the load size of form 1A.

Hereinafter, the example of the information field that can serve as sky information when use DCI format 0 launches the control information being used for SPS activation will be described.

(1) the 1st embodiment

If it is assumed that UE do not perform for downlink VoIP transmission irregular PUSCH feed back in the case of only perform feedback based on PUCCH, then CQI request field can serve as sky information.

Table 4 below shows the 1st embodiment of the control information using the DCI format 0 activated for PUSCH scheduling and SPS to launch.

[table 4]

If the information of control activates for up-link SPS, then the value of CQI request field is set to " 0 ".The residue field of the DCI format 0 in addition to CQI request field is identical with shown in table 3 above.Assume UE do not perform for downlink VoIP transmission irregular PUSCH feed back in the case of only perform feedback based on PUCCH.

(2) the 2nd embodiments

Assume that the control information activated for the instruction SPS of up-link VoIP packet transmission need not extra close-loop power control, and power based on open-loop type or mixed type controls to determine the Tx power that VoIP transmits.When by considering that the assignment of semi-persistent resource block does not uses the TPC command field of the PUSCH about scheduling, TPC command field can serve as sky information.

Table 5 below shows the 2nd embodiment of the control information using the DCI format 0 activated for PUSCH scheduling and SPS to launch.

[table 5]

If the information of control activates for up-link SPS, then the value of TPC command field can be set to that " 0 ".The residue field of the DCI format 0 in addition to TPC command field is identical with shown in table 3 above.

(3) the 3rd embodiments

The control information activated for the instruction SPS of up-link VoIP packet transmission can not impliedly use the new data indicator field delivered for customizing messages.In this case, new data indicator field can serve as sky information.

Table 6 below shows the 3rd embodiment of the control information using the DCI format 0 activated for PUSCH scheduling and SPS to launch.

[table 6]

If the information of control activates for up-link SPS, then the value of new data indicator field is set to " 0 ".The residue field of the DCI format 0 in addition to new data indicator field is identical with shown in table 3 above.

(4) the 4th embodiments

The control information activated for the instruction SPS of up-link VoIP packet transmission can use extra signaling in the case of the MCS in not indicating MCS and redundancy version field or redundancy versions.When using extra signaling in the case of the MCS in not indicating MCS and redundancy version field, 3 bits in 5 bits of MCS and redundancy version field can be used for sky information.When using extra signaling in the case of not indicating the redundancy versions in redundancy version field, 2 bits in 5 bits can be used for sky information.When all using extra signaling for MCS and redundancy versions, 5 bits are used equally to sky information.

Table 7 below shows the 4th embodiment of the control information using the DCI format 0 activated for PUSCH scheduling and SPS to launch.

[table 7]

If the information of control activates for up-link SPS, then 2,3 or 5 bits in 5 bits of MCS and redundancy version field are set to " 0 ".Except the residue field of MCS DCI format 0 in addition to redundancy version field is identical with shown in table 3 above.

(5) the 5th embodiments

The control information activated for the instruction SPS of up-link VoIP packet transmission can not indicate the cyclic shift field about demodulation fiducial mark (DM-RS) extraly.In this case, cyclic shift field is for empty information.

Table 8 below shows the 5th embodiment of the control information using the DCI format 0 activated for PUSCH scheduling and SPS to launch.

[table 8]

If the information of control activates for up-link SPS, then the value of cyclic shift field can be set to that " 0 ".The residue field of the DCI format 0 in addition to TPC command field is identical with shown in table 3 above.

(6) the 6th embodiments

The control information activated for the instruction SPS of up-link VoIP packet transmission can allow VoIP restriction can be dispensed on the bandwidth in whole system bandwidth.In this case, Resource Block assignment and frequency-hopping resource allocation field can serve as sky information.?

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{UL}}(N_{\mathrm{RB}}^{\mathrm{UL}}+1)/2)\right|$

In individual bit, M bit can be used for sky information.Here, M be from 1 to

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{UL}}(N_{\mathrm{RB}}^{\mathrm{UL}}+1)/2)\right|-1$

Scope in natural number.

Table 9 below shows the 5th embodiment of the control information using the DCI format 0 activated for PUSCH scheduling and SPS to launch.

[table 9]

If the information of control activates for up-link SPS, then

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{UL}}(N_{\mathrm{RB}}^{\mathrm{UL}}+1)/2)\right|$

M bit in individual bit is set to " 0 ".Here, M be from 1 to

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{UL}}(N_{\mathrm{RB}}^{\mathrm{UL}}+1)/2)\right|-1$

Scope in natural number.Except the residue field of Resource Block assignment DCI format 0 in addition to frequency-hopping resource allocation field is identical with shown in table 3 above.

(7) the 7th embodiments

The combination of multiple information fields of DCI format 0 is used as empty information.Can be by the combination of any information field for use as empty information.Whole information field can serve as sky information.The information field being used as sky information in the 1st to the 6th embodiment can be used in the combination of multiple information fields.Such as, as described in the 4th embodiment, when extra signaling is for MSC or redundancy versions, the combination of multiple information fields can use 2,3 or 5 bits in 5 bits of MCS and redundancy version field.When using FDD (FDD) system, by the bit of up-link index field is attached to be used as in the 1st to the 6th embodiment the information field of sky information, the bit of up-link index field can serve as sky information.

(8) the 8th embodiments

8th embodiment is the detailed embodiment of the 7th embodiment.If using DCI format 0 to launch the control information activated for SPS, then the combination of Resource Block assignment and frequency-hopping resource allocation field, MCS and redundancy version field, TPC command field, cyclic shift field and CQI request field can serve as sky information.

Table 10 below shows the 8th embodiment of the control information using the DCI format 0 activated for PUSCH scheduling and SPS to launch.

[table 10]

Here, the M during Resource Block assignment and frequency-hopping resource distribute can be specifically set as " 2 ", and the N in MCS and redundancy version field can be specifically set as " 1 ".

(9) the 9th embodiments

9th embodiment is the detailed embodiment of the 7th embodiment.If using DCI format 0 to launch the control information activated for SPS, then the combination of Resource Block assignment and frequency-hopping resource allocation field, MCS and redundancy version field, new data indicator field, TPC command field, cyclic shift field and CQI request field can serve as sky information.This is that new data indicator field is added to the information field combination of the 8th embodiment so that being used as the situation of empty information.

Table 1 below 1 shows the 9th embodiment of the control information using the DCI format 0 activated for PUSCH scheduling and SPS to launch.

[table 11]

Here, the M during Resource Block assignment and frequency-hopping resource distribute can be specifically set as " 2 ", and the N in MCS and redundancy version field can be specifically set as " 1 ".

(10) the 10th embodiments

10th embodiment is the detailed embodiment of the 7th embodiment.If using DCI format 0 to launch the control information activated for SPS, then according to the relation between Resource Block assignment and frequency-hopping resource allocation field and MCS and redundancy version field, empty information can be used for the two field.The two field can be relevant by extra RRC instruction.In addition to the two field, the combination of TPC command field, cyclic shift field and CQI request field is also used as sky information.

Table 1 below 2 shows the 10th embodiment of the control information using the DCI format 0 activated for PUSCH scheduling and SPS to launch.

[table 12]

Here, R can be 1,2 ... or can be

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{UL}}(N_{\mathrm{RB}}^{\mathrm{UL}}+1)/2)\right|+4$

Individual bit.Alternatively, R can be specifically set as " 3 " or " 4 ".

(11) the 11st embodiments

11st embodiment is the detailed embodiment of the 7th embodiment.If using DCI format 0 to launch the control information activated for SPS, then new data indicator field is added to the information field combination of the 10th embodiment so that being used as empty information.

Table 1 below 3 shows the 11st embodiment of the control information using the DCI format 0 activated for PUSCH scheduling and SPS to launch.

[table 13]

Here, R can be 1,2 ... or can be

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{UL}}(N_{\mathrm{RB}}^{\mathrm{UL}}+1)/2)\right|+4$

Individual bit.Alternatively, R can be specifically set as " 3 " or " 4 ".

The method being now used for description using DCI format 1A to launch the control information that instruction SPS activates.DCI format 1A can be used for launching the control information of the compact scheduling for a PDSCH code word and the control information of instruction SPS activation.SPS activates and can be used for the transmission of up-link VoIP.

Table 1 below 4 shows the example of the control information using DCI format 1A to launch.

[table 14]

DCI format 1A includes multiple information field.This information field is (1) attribute field, (2) localization/distributed virtual resource block (VRB) assignment attribute field, (3) Resource Block assignments field, (4) modulation and encoding scheme (MCS) field, (5) mixed automatic repeat request (HARQ) process number field, (6) new data indicator field, (7) redundancy version field, (8) TPC command field and (9) downlink allocation index field.Bit size the being merely cited for property purpose of each information field, and therefore bit size is not limited to this.

Attribute field is for making form 0 be different from the information field of form 1A.If the CRC of DCI format 1A is scrambled by RA-RNTI, P-RNTI or SI-RNTI, then the row of bit instruction transmission block size (TBS) form of attribute fieldIf attribute field is " 0 ", thenIt is 20.If attribute field is " 1 ", thenIt is " 3 ".Otherwise, attribute field instruction DCI format.

Resource Block assignments field can have the bit size according to localization VRB or virtual reality B change.Resource Block assignments field for the VRB that localizes provides

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|$

Individual bit is used for resource assignation.Here,The number of the Resource Block that expression downlink time slots includes, and depend on the downlink Tx bandwidth determined in community.For virtual reality B Resource Block assignments field according toWhether less than 50 orWhether change more than or equal to 50.IfIf less than 50 or DCI format 1A CRC by RA-RNTI, P-RNTI or SI-RNTI scrambled, then

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|$

Individual bit is provided for resource assignation, ifMore than or equal to 50, then

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|-1$

Individual bit is provided for resource assignation.

If the CRC of DCI format 1A is scrambled by RA-RNTI, P-RNTI or SI-RNTI, then new data indicator field instruction gap width.Such as, if new data indicator field is " 0 ", then Ngap is Ngap, 1.If new data indicator field is " 1 ", then Ngap is Ngap, 2.Otherwise, new data indicator field instruction new data.

All foregoing fields can be used to represent the control information of the channel assignment on instruction PDSCH.Therefore, the control information with reference information size meets DCI format 1A of the channel for assigning PDSCH.

Hereinafter, the example of the information field that can serve as sky information when use DCI format 1A launches the control information being used for SPS activation will be described.

(12) the 12nd embodiments

The control information activated for the instruction SPS of downlink VoIP packet transmission need not report that the HARQ procedure for downlink VoIP transmission is numbered.In this case, HARQ procedure number field can serve as sky information.Such as, if it is assumed that UE do not perform for downlink VoIP transmission irregular PUSCH feed back in the case of only perform feedback based on PUCCH, then HARQ procedure number field can serve as sky information.

Table 1 below 5 shows the 12nd embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 15]

If the information of control activates for downlink SPS, then HARQ procedure number field is set to " 0 ".The residue field of DCI format 1A in addition to HARQ procedure number field is identical with shown in table 14 above.

(13) the 13rd embodiments

Assume that the control information activated for the instruction SPS of downlink VoIP packet transmission need not extra close-loop power control, and power based on open-loop type or mixed type controls to determine the Tx power that PUCCH transmits.When by considering that the assignment of semi-persistent resource block does not uses TPC command field, TPC command field can serve as sky information.

Table 1 below 6 shows the 13rd embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 16]

If the information of control activates for downlink SPS, then the value of TPC command field can be set to that " 0 ".The residue field of DCI format 1A in addition to TPC command field is identical with shown in table 14 above.

(14) the 14th embodiments

The control information activated for the instruction SPS of downlink VoIP packet can not impliedly use the new data indicator field delivered for customizing messages.In this case, new data indicator field can serve as sky information.

Table 1 below 7 shows the 14th embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 17]

If the information of control activates for downlink SPS, then the value of new data indicator field is set to " 0 ".The residue field of DCI format 1A in addition to new data indicator field is identical with shown in table 14 above.

(15) the 15th embodiments

The control information activated for the instruction SPS of downlink VoIP packet can not impliedly use the redundancy version field delivered for customizing messages.In this case, redundancy version field can serve as sky information.

Table 1 below 8 shows the 14th embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 18]

If the information of control activates for downlink SPS, then the value of redundancy version field is set to " 0 ".The residue field of DCI format 1A in addition to redundancy version field is identical with shown in table 14 above.

(16) the 16th embodiments

The control information activated for the instruction SPS of downlink VoIP packet can use extra signaling in the case of the MCS in not indicating MCS field.Alternatively, it is possible to use modulation scheme and the some or all of possible situation of code rate.In this case, Q bit in 5 bits of MCS field can serve as sky information.Here, the natural number during Q is the scope of 1 to 5.

Table 1 below 9 shows the 16th embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 19]

If the information of control activates for downlink SPS, then Q bit in 5 bits of MCS field is set to " 0 ".Here, the natural number during Q is the scope of 1 to 5.The residue field of DCI format 1A in addition to MCS field is identical with shown in table 14 above.

(17) the 17th embodiments

The control information activated for the instruction SPS of downlink VoIP packet can allow VoIP to limit distribution bandwidth in whole system bandwidth.In this case, Resource Block assignments field can serve as sky information.?

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|$

In individual bit, P bit can be used for sky information.Here, P be from 1 to

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|-1$

Scope in natural number.

Table 2 below 0 shows the 17th embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 20]

If the information of control activates for downlink SPS, then

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|$

In P bit be set to " 0 ".Here, P be from 1 to

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|-1$

Scope in natural number.The residue field of DCI format 1A in addition to Resource Block assignments field is identical with shown in table 14 above.

(18) the 18th embodiments

The combination of multiple information fields of DCI format 1A is used as empty information.Can be by the combination of any information field for use as empty information.Whole information field can serve as sky information.The information field being used as sky information in the 12nd to the 17th embodiment can be used in the combination of multiple information fields.Such as, as described in the 16th embodiment, when extra signaling is for MSC, the combination of multiple information fields can use Q bit in 5 bits of MCS field.Here, the natural number during Q is the scope of 1 to 5.Additionally, as in the 17th embodiment, the combination of information field can use Resource Block assignments field

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|$

P bit in individual bit.Here, P be from 1 to

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|-1$

Scope in natural number.When using FDD system, by the bit of downlink index field is attached to be used as in the 12nd to the 17th embodiment the information field of sky information, the bit of downlink index field can serve as sky information.

(19) the 19th embodiments

19th embodiment is the detailed embodiment of the 18th embodiment.If using DCI format 1A to launch the control information activated for SPS, then the combination of Resource Block assignments field, MCS field and redundancy version field is used as empty information.

Table 2 below 1 shows the 19th embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 21]

(20) the 20th embodiments

20th embodiment is the detailed embodiment of the 18th embodiment.If using DCI format 1A to launch the control information activated for SPS, then the combination of Resource Block assignments field, MCS field, new data indicator field and redundancy versions is used as empty information.This is that the combination of the information field that new data indicator field is added to the 19th embodiment is so that being used as the situation of empty information.

Table 2 below 2 shows the 20th embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 22]

(21) the 21st embodiments

21st embodiment is the detailed embodiment of the 18th embodiment.If using DCI format 1A to launch the control information activated for SPS, then the combination of Resource Block assignments field, MCS field, HARQ procedure number field and redundancy version field is used as empty information.This is that the combination of the information field that HARQ procedure number field is added to the 19th embodiment is so that being used as the situation of empty information.

[table 23]

(22) the 22nd embodiments

22nd embodiment is the detailed embodiment of the 18th embodiment.If using DCI format 1A to launch the control information activated for SPS, then the combination of Resource Block assignments field, MCS field, HARQ procedure number field, new data indicator field and redundancy version field is used as empty information.This is that the combination of the information field that new data indicator field is added to the 21st embodiment is so that being used as the situation of empty information.

[table 24]

(23) the 23rd embodiments

23rd embodiment is the detailed embodiment of the 18th embodiment.If using DCI format 1A to launch the control information activated for SPS, then according to the relation between Resource Block assignments field and MCS field, empty information can be used for the two field.The two field can be relevant by extra RRC instruction.In addition to the two field, redundancy version field also can be further combined so that being used as empty information.

Table 2 below 5 shows the 23rd embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 25]

Here, S can be 1,2 ... or can be

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|+4$

Individual bit.

(24) the 24th embodiments

24th embodiment is the detailed embodiment of the 18th embodiment.If using DCI format 1A to launch the control information activated for SPS, then according to the relation between Resource Block assignments field and MCS field, empty information can be used for the two field.The two field can be relevant by extra RRC instruction.In addition to the two field, the combination of new data indicator field and redundancy version field can serve as sky information.This is that the combination of the information field that new data indicator field is added to the 23rd embodiment is so that being used as the situation of empty information.

Table 2 below 6 shows the 24th embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 26]

Here, S can be 1,2 ... or can be

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|+4$ Individual bit.

(25) the 25th embodiments

25th embodiment is the detailed embodiment of the 18th embodiment.If using DCI format 1A to launch the control information activated for SPS, then according to the relation between Resource Block assignments field and MCS field, empty information can be used for the two field.The two field can be relevant by extra RRC instruction.In addition to the two field, the combination of HARQ procedure number field and redundancy version field can serve as sky information.This is that the combination of the information field that HARQ procedure number field is added to the 23rd embodiment is so that being used as the situation of empty information.

Table 2 below 7 shows the 25th embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 27]

Here, S can be 1,2 ... or can be

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|+4$ Individual bit.

(26) the 26th embodiments

26th embodiment is the detailed embodiment of the 18th embodiment.If using DCI format 1A to launch the control information activated for SPS, then according to the relation between Resource Block assignments field and MCS field, empty information can be used for the two field.The two field can be relevant by extra RRC instruction.In addition to the two field, the combination of HARQ procedure number field, new data indicator field and redundancy version field can serve as sky information.This is that the combination of the information field that new data indicator field is added to the 25th embodiment is so that being used as the situation of empty information.

Table 2 below 8 shows the 26th embodiment of the control information using DCI format 1A activated for PDSCH channel assignment and SPS to launch.

[table 28]

Here, S can be 1,2 ... or can be

$\left|{\log }_2(N_{\mathrm{RB}}^{\mathrm{DL}}(N_{\mathrm{RB}}^{\mathrm{DL}}+1)/2)\right|+4$ Individual bit.

(27) the 27th embodiments

DCI format 1 can be used for launching the control information of the channel assignment on PDSCH, and the generic resource that this control information activates based on the instruction SPS for downlink VoIP packet transmission distributes and the information of control.In the method for the 12nd to the 26th embodiment, indicate the control information of the channel assignment on PDSCH using DCI format 1A to launch under conditions of, the specific resources that wherein this control information activates based on the instruction SPS for downlink VoIP packet transmission is distributed and the information of control, and the information field defined in DIC form 1A is used as empty information.The method of the 12nd to the 26th embodiment can be equally applicable to the situation using DCI format 1 to launch the control information that instruction SPS activates.Information field defined in DCI format 1 is also used as sky information.

(28) the 28th embodiments

DCI format 2 can be used for launching the control information of the PDSCH scheduling of the UE for being set to spatial multiplexing modes and the control information activated for SPS for downlink VoIP packet transmission.The method of the 12nd to the 26th embodiment can be equally applicable to the situation using DCI format 2 to launch the control information activated for SPS.Information field defined in DCI format 2 is also used as sky information.

DCI format 2 includes that HARQ exchanges attribute field.HARQ exchanges attribute field can also be used as empty information by being affixed to be used as the information field of sky information in DCI format 2.HARQ exchanges attribute field and likely combining of other information fields is also used as sky information.

As described above, can provide in a wireless communication system have raising accuracy for the method detecting control information.The particular value of error check field can serve as virtual CRC.Subscriber equipment can improve, by the virtual CRC of use, the accuracy that crc error checks when detecting control information.That is, control information can be detected while effectively utilizing radio resource exactly.It is thus possible to improve overall system performance.

All functions as described above can be performed by the processor of such as microprocessor, controller, microcontroller and special IC (ASIC) according to the software or program code for performing this function.Can design, develop and realize this program code based on description of the invention, and this is known for those skilled in the art.

Although being particularly shown and described the present invention by the exemplary embodiment with reference to the present invention, but it should be understood by those skilled in the art that, on the premise of without departing from the spirit and scope of the present invention the most defined in the appended claims, it can be carried out the various changes in form and details.Exemplary embodiment should be considered only as illustrative not for the purpose limited.Therefore, the scope of the present invention is not limited by the detailed description of the present invention, but is defined by the following claims, and all differences in this scope is to be interpreted as being included in the invention.

Claims (10)

1. one kind is detected control information for use downlink time slots in a wireless communication system Method, described downlink time slots includes multiple OFDM (OFDM) symbol, institute The method of stating includes:

By monitoring that physical downlink control channel (PDCCH) checks cyclic redundancy check (CRC) (CRC) mistake；

If being not detected by crc error in PDCCH, it is determined that new data indicator (NDI) Value whether equal to zero, wherein NDI is to control at the downlink being included on PDCCH The field in the middle of field in information (DCI)；And

If described NDI is equal to zero, then detects described NDI and be used for the activation of semi-persistent scheduling,

Wherein, user equipment identifiers (UE-ID) on CRC by mask.

2. the method for claim 1, wherein said UE-ID is that semi-durable community is wireless Electric network temporary identifier (C-RNTI).

3. the method for claim 1, the activation of wherein said semi-persistent scheduling and interconnection FidonetFido voice (VoIP) is associated, and wherein further receiving resource allocation information with In semi-persistent scheduling.

4. method as claimed in claim 3, farther includes by using resource allocation information In SPS interim at physical down link sharing channel (PDSCH) upper reception VoIP number According to.

5. method as claimed in claim 3, farther includes by using resource allocation information At SPS interim ink Shared Channel physically (PUSCH) upper transmitting VoIP number According to.

6. use a subscriber equipment for downlink time slots in a wireless communication system, described under Uplink time slots includes multiple OFDM (OFDM) symbol, and described subscriber equipment includes:

Radio frequency (RF) unit, described radio frequency (RF) unit is used for launching and receiving aerogram Number；With

Processor, described processor couples with described RF unit and is configured to:

By monitoring that physical downlink control channel (PDCCH) checks cyclic redundancy check (CRC) (CRC) mistake,

If being not detected by crc error in PDCCH, it is determined that new data indicator (NDI) Value whether equal to zero, wherein NDI is to control at the downlink being included on PDCCH The field in the middle of field in information (DCI)；And

If described NDI is equal to zero, then detects described NDI and be used for the activation of semi-persistent scheduling,

Wherein, user equipment identifiers (UE-ID) on CRC by mask.

7. subscriber equipment as claimed in claim 6, wherein said UE-ID is semi-durable community Radio network temporary identifier (C-RNTI).

8. subscriber equipment as claimed in claim 6, the activation of wherein said semi-persistent scheduling with Voice over internet protocol (VoIP) is associated, and wherein further receiving resource allocation information For semi-persistent scheduling.

9. subscriber equipment as claimed in claim 8, farther includes by using resource to distribute Information receives VoIP in SPS interim on physical down link sharing channel (PDSCH) Data.

10. subscriber equipment as claimed in claim 8, farther includes by using resource to divide Join information and launch VoIP on SPS interim ink Shared Channel physically (PUSCH) Data.